Unaudited Selected Quarterly Data (Tables)

12 Months Ended

Dec. 31, 2020

Dec. 31, 2019

Quarterly Financial Information Disclosure [Abstract]

Quarterly Financial Information [Table Text Block]

2020
In millions, except per share amounts	1st Qtr		2nd Qtr		3rd Qtr		4th Qtr
Sales	$	8,620	$	8,884	$	9,083	$	10,212
Operating income	934		994		985		1,152
Net earnings	868		1,005		986		330
Basic earnings per share	5.18		6.02		5.91		1.98
Diluted earnings per share	5.15		6.01		5.89		1.97
Weighted-average common shares outstanding	167.7		166.9		166.8		166.8
Weighted-average diluted shares outstanding	168.4		167.3		167.3		167.4

2019
In millions, except per share amounts	1st Qtr		2nd Qtr		3rd Qtr		4th Qtr
Sales	$	8,189	$	8,456	$	8,475	$	8,721
Operating income	936		946		951		1,136
Net earnings (loss)	863		861		933		(409)
Basic earnings (loss) per share	5.08		5.07		5.52		(2.43)
Diluted earnings (loss) per share(1)	5.06		5.06		5.49		(2.43)
Weighted-average common shares outstanding	170.0		169.7		169.1		168.4
Weighted-average diluted shares outstanding(1)	170.7		170.3		169.9		168.4